We used to use the minimote, which is another device, But now you can just use the Z wave Tweaker, which is software, a device driver. You will temporarily assign your accessory switch to that driver, set all the associations, and then assign the switch back to the regular driver. The associations are stored in the firmware on the switch itself, so they will still be set.
It sounds harder than it is, it’s basically just copy and paste, and there are lots of people who will be glad to help you. Unfortunately, I’m not feeling very well today, so I’m going to leave it up to other people going forward. But you can find the tweaker in the following thread and ask questions there:
And here’s the community FAQ on how to install custom code. You will need to be using the classic app for this, but it’s fine if you have both versions of the app. (The topic title is a clickable link)